Things You'll Need
Instructions
Log into your Xbox LIVE account. This should be the account that you wish to play the original Xbox games on.
Confirm that you would like to download the automatic system update if applicable. The system update prompt will only appear if there is one available. If there is no prompt, then you already have the required upgrade necessary to play original Xbox games.
Ensure that the original Xbox game you wish to play is backward-compatible with your Xbox 360 by viewing the alphabetical compatibility list on Xbox.com. See Resources for the hyperlink. Games not on the list will not run on the Xbox 360.
Download the game patch for your desired compatible original Xbox game by inserting it into your console and booting it up. Select "Yes, update now" to have the console automatically download and install the patch. The game will restart and be playable after the installation, which takes just a few seconds.